19861640

素因数分解:

$2^3\times 5^1\times {\mathrm{683}}^1\times {\mathrm{727}}^1$

素因数の和:1421

約数の個数: 32

約数和(自身を含む): 44815680

約数和(自身を除く): 24954040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 683, 727, 1366, 1454, 2732, 2908, 3415, 3635, 5464, 5816, 6830, 7270, 13660, 14540, 27320, 29080, 496541, 993082, 1986164, 2482705, 3972328, 4965410, 9930820, 19861640]

約数ペア:

[(1, 19861640), (2, 9930820), (4, 4965410), (5, 3972328), (8, 2482705), (10, 1986164), (20, 993082), (40, 496541), (683, 29080), (727, 27320), (1366, 14540), (1454, 13660), (2732, 7270), (2908, 6830), (3415, 5816), (3635, 5464)]